Grease a Panettone pan with softened butter
Place the warm milk in a bowl and add the yeast and 1 tsp of sugar, mix well and leave for a few minutes.
Put the remaining sugar in a large bowl and beat together with the butter and vanilla extract, using a hand mixer, until light and creamy.
Add lemon and orange zest and mix.
Add the eggs a little at a time until all are well incorporated.
If the mixture starts to curdle, add a tablespoon of the flour and beat in with the eggs.
Place the flour in a large bowl and mix with a pinch of salt and make a well.
Add the yeast mixture then the butter and egg mixture, folding in with a large spoon to make a soft dough.
Knead for 5 mins in the bowl until the mixture starts to come together and is pretty sticky.
Put the dough onto a floured surface and knead for 10 more minutes, until everything has come together and you get a soft, stretchy dough. Add a light sprinkling of flour to the surface and your hands to stop the mixture sticking.
Place in a lightly greased bowl and cover with plastic wrap; keep in a warm place for 2 hrs or until it doubled in size.
Place the raisins in a small saucepan with the rum extract and heat on low for about 5 mins or until the fruit has absorbed the liquid; set aside to cool.
When the dough is risen, tip it out onto a lightly floured surface and knead for another 5 mins.
Gradually knead in the soaked raisins and chopped candied peel. Shape the dough into a ball and pop into the prepared Panettone pan.
If using an 8" deep cake pan, wrap a layer of baking parchment around the outside of the tin, to come up about 2" above the rim, and secure the paper with string. This will help contain the dough as it rises.
Cover lightly with a towel or plastic wrap and leave to rise for another hour until it has risen to the top of the pan or paper.
Preheat the oven to 350 F
Mix together the icing sugar and egg white and gently brush over the top of the Panettone.
Place the Panettone in the oven and bake for 50 - 55 mins or until golden and risen. Insert a skewer into the middle of the cake to test if done.
Leave to cool in the pan for 10 mins before turning out onto a cooling rack.
Leave to cool completely before dusting with icing sugar.
Cut into wedges to serve.
Notes
Notes: Start with 2 and 1/4 cup of flour. Initially the dough will be very sticky and hard to knead. Continue to work on the dough adding more flour. In the initial stage, you might need to add up to 1/4 cup more.
Then you will be dusting flour a lot throughout the entire process: you need to dust the bowl where you prepare the dough so you can remove the dough from the bowl and move it to the counter to knead. You also need to dust your hands to help the dough come together and remove it from the bowl. You’ll need to dust the working area so the dough doesn’t stick. While here, you’ll need more dusting for your hands so you can knead the dough.
Then you move the dough to a bowl and wait for it to rise. Next you’ll move the dough from the bowl to the counter top to knead one more time and incorporate the fruit.
You might end up adding up to 3 and 2/3 to 4 cups of flour in total. Adding flour bit by bit while kneading is what makes the bread so soft and gives it that special texture.
It’s a very soft, sticky, elastic dough. The stickiness is due to the amount of butter added. It makes this cake soft, fluffy and moist.